Nasa elearning

i think that's worth checking out - from Elliot Masie's newsletter

e-Learning from NASA: The Space Agency is making available a free Web-based educational product to learners of all ages across the country. NASA eClips consists of more than 55 short, 5-10 minute video segments, which are available on-demand via the Internet. NASA eClips features many of the agency's missions and engages learners in the excitement of science and engineering.
Check it out at: http://www.nasa.gov/education/nasaeclips